Health said…
“They take it with them to their family and return to their nest. They die there.”
Sorry “Health”, but you are incorrect.
What you said IS true regarding ROACH bait, but NOT mouse bait.
Mice do NOT bring the bait to the mishpacha, roaches DO.
Mice eat whatever they eat on the spot and then go vaiyter.
Fortunately, they do NOT usually die in their “nest”, i.e. in your walls, (although SOMETIMES they do).
Mouse poison works in 2 ways (not to get too gross)- it contains an anti-coagulant, which means they bleed internally, AND a dessicant that makes them very thirsty, which, fortunately, usually sends them back outside in search for water, and that is where they die.
IMPORTANT NOTE: If you are using poison or traps, be sure they can NOT be reached or touched by children!